MboxTransport.php

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<?php
namespace TYPO3\CMS\Core\Mail;

class MboxTransport implements \Swift_Transport {

    private $debugFile;

    public function __construct($debugFile) {
        $this->debugFile = $debugFile;
    }

    public function isStarted() {
        return FALSE;
    }

    public function start() {

    }

    public function stop() {

    }

    public function send(\Swift_Mime_Message $message, &$failedRecipients = NULL) {
        $message->generateId();
        // Create a mbox-like header
        $mboxFrom = $this->getReversePath($message);
        $mboxDate = strftime('%c', $message->getDate());
        $messageStr = sprintf('From %s  %s', $mboxFrom, $mboxDate) . LF;
        // Add the complete mail inclusive headers
        $messageStr .= $message->toString();
        $messageStr .= LF . LF;
        $lockObject = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Core\\Locking\\Locker', $this->debugFile);
        $lockObject->acquireExclusiveLock();
        // Write the mbox file
        $file = @fopen($this->debugFile, 'a');
        if (!$file) {
            $lockObject->release();
            throw new \RuntimeException(sprintf('Could not write to file "%s" when sending an email to debug transport', $this->debugFile), 1291064151);
        }
        @fwrite($file, $messageStr);
        @fclose($file);
        \TYPO3\CMS\Core\Utility\GeneralUtility::fixPermissions($this->debugFile);
        $lockObject->release();
        // Return every receipient as "delivered"
        $count = count((array) $message->getTo()) + count((array) $message->getCc()) + count((array) $message->getBcc());
        return $count;
    }

    private function getReversePath(\Swift_Mime_Message $message) {
        $return = $message->getReturnPath();
        $sender = $message->getSender();
        $from = $message->getFrom();
        $path = NULL;
        if (!empty($return)) {
            $path = $return;
        } elseif (!empty($sender)) {
            $keys = array_keys($sender);
            $path = array_shift($keys);
        } elseif (!empty($from)) {
            $keys = array_keys($from);
            $path = array_shift($keys);
        }
        return $path;
    }

    public function registerPlugin(\Swift_Events_EventListener $plugin) {
        return TRUE;
    }

}